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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7930493eac9f9aba057249f76a37aa45323aacbcc63949fc1fcb70c2179dd51' 
  AND token = 'rD08Syd11z/BOfkfqxgBRySUxS4une/vSAajCyYprUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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