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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0abf87f3725afaf9cef75568491c0a3dcad66c0a737b6abcf52e884c5572ec75' 
  AND token = 'y8sQzOR2r35L5KnOs+nqMLwb1MugQEiIyIMz18pcjAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}