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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53a375b63d4538e007153397c0423faa3223c76d4e40bd899eb4baeb45b2eb75' 
  AND token = '3oqzjRzgcTqdD6p7kMD/G4Dl1oKBK2yt4BHEwMGAMeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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