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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'eac3c85c9d27fdce86077918fdc6e9410f4d9a06940fd2d61f34f80ef107589c' 
  AND token = 'sHsoepW9blXvWQ1bVDYIFM1/EfL74Deb54McoY86ib8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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