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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eff01c7e11937c51395b947b7b97816ae9b89de6aaaeb97969d7e180d5070a0e' 
  AND token = '/h5zboDGscYlSKfLpNty/MCDIvTdqMn5q5XADvn1F6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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