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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7b2e2f0acf99901198cc16430b772d9e5064776305c5cd589e1f33f649438c9' 
  AND token = 'd/Vp0Pu2iA3/9eq0j+QJ/GQ/gocIeUjAKTO2UEeJud4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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