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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b07ce2cf404a16ad8d4e83833066e7f6d5e43956c10fdb4bfa2c8cb80551170' 
  AND token = 'yWrsrG/9v+jB1MDbmzzJk3/orLcadSP2nbYIKZerlfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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