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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee25e75b6b5b4c64c9724eefe9fd7abba140ba84defa8ee4d3825fe2cd131098' 
  AND token = 'nvGLYf2H1xW3q/dpGandGR/7bcvtvdADE/uMxBAYY+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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